Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11806255 | Multi-chamber vacuum pump | John A. Erdmann, Charles C. Polta, Douglas E. Rush | 2023-11-07 |
| 10426639 | Multi-chamber vacuum pump | John A. Erdmann, Charles C. Polta, Douglas E. Rush | 2019-10-01 |